Planning a run, everyone with a different signature weapon

[Kneller]

I'm thinking of dusting off the game again and am currently planning my squad out. One thing I want to do differently is to ultimately give each recruit their own signature weapon. I usually do something like a couple snipers, a couple pulse rifles, a gauss rifle, and the browning, but I want to mix it up this time. I'm having trouble picking weapon #6. I figure I'll have the browning, gauss rifle, pulse rifle, jackhammer, and sniper rifle. Is there another gun that's possible to keep fed and can hold its own in the end game? Thanks!